package sssex.wizards;

import java.io.ByteArrayInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.UnsupportedEncodingException;
import java.lang.reflect.InvocationTargetException;

import org.eclipse.core.resources.IContainer;
import org.eclipse.core.resources.IFile;
import org.eclipse.core.resources.IResource;
import org.eclipse.core.resources.IWorkspaceRoot;
import org.eclipse.core.resources.ResourcesPlugin;
import org.eclipse.core.runtime.CoreException;
import org.eclipse.core.runtime.IProgressMonitor;
import org.eclipse.core.runtime.IStatus;
import org.eclipse.core.runtime.Path;
import org.eclipse.core.runtime.Status;
import org.eclipse.jface.dialogs.MessageDialog;
import org.eclipse.jface.operation.IRunnableWithProgress;
import org.eclipse.jface.viewers.ISelection;
import org.eclipse.jface.viewers.IStructuredSelection;
import org.eclipse.jface.wizard.Wizard;
import org.eclipse.ui.INewWizard;
import org.eclipse.ui.IWorkbench;
import org.eclipse.ui.IWorkbenchPage;
import org.eclipse.ui.IWorkbenchWizard;
import org.eclipse.ui.PartInitException;
import org.eclipse.ui.PlatformUI;
import org.eclipse.ui.ide.IDE;

/**
 * This is a sample new wizard. Its role is to create a new file 
 * resource in the provided container. If the container resource
 * (a folder or a project) is selected in the workspace 
 * when the wizard is opened, it will accept it as the target
 * container. The wizard creates one file with the extension
 * "eclick". If a sample multi-page editor (also available
 * as a template) is registered for the same extension, it will
 * be able to open it.
 */

public class SampleNewWizard extends Wizard implements INewWizard {
	private SampleNewWizardPage page;
	private ISelection selection;
 
	/** 
	 * Constructor for SampleNewWizard.
	 */
	public SampleNewWizard() {
		super(); 
		setNeedsProgressMonitor(true);
	}
	
	/**
	 * Adding the page to the wizard.
	 */

	public void addPages() {
		page = new SampleNewWizardPage(selection);
		addPage(page);
	}

	/**
	 * This method is called when 'Finish' button is pressed in
	 * the wizard. We will create an operation and run it
	 * using wizard as execution context.
	 */
	public boolean performFinish() {
		final String containerName = page.getContainerName();
		final String fileName = page.getFileName();
		IRunnableWithProgress op = new IRunnableWithProgress() {
			public void run(IProgressMonitor monitor) throws InvocationTargetException {
				try {
					doFinish(containerName, fileName, monitor);
				} catch (CoreException e) {
					throw new InvocationTargetException(e);
				} finally {
					monitor.done();
				}
			}
		};
		try {
			getContainer().run(true, false, op);
		} catch (InterruptedException e) {
			return false;
		} catch (InvocationTargetException e) {
			Throwable realException = e.getTargetException();
			MessageDialog.openError(getShell(), "Error", realException.getMessage());
			return false;
		}
		return true;
	}
	
	/**
	 * The worker method. It will find the container, create the
	 * file if missing or just replace its contents, and open
	 * the editor on the newly created file.
	 */

	private void doFinish(
		String containerName,
		String fileName,
		IProgressMonitor monitor)
		throws CoreException {
		try{
			System.out.println("containerName:"+containerName);
			//containerName="ssss";
			// create a sample file
			monitor.beginTask("Creating " + fileName, 2);
			IWorkspaceRoot root = ResourcesPlugin.getWorkspace().getRoot();
			IResource resource = root.findMember(new Path(containerName));
			if (!resource.exists() || !(resource instanceof IContainer)) {
				throwCoreException("Container \"" + containerName + "\" does not exist.");
			}
			IContainer container = (IContainer) resource;
			final IFile file = container.getFile(new Path(fileName));
			System.out.println("file.exists():"+file.exists());
			try {
				InputStream stream = openContentStream(containerName);
				if (file.exists()) {
					file.setContents(stream, true, true, monitor);
				} else {
					file.create(stream, true, monitor);
					file.setCharset("UTF-8", monitor);
				}
				stream.close();
			} catch (Throwable e) {
				e.printStackTrace();
			}
			monitor.worked(1);
			System.out.println("Opening file for editing...");
			monitor.setTaskName("Opening file for editing...");
			System.out.println("Opening file for editing...");
			getShell().getDisplay().asyncExec(new Runnable() {
				public void run() {
					IWorkbenchPage page =
						PlatformUI.getWorkbench().getActiveWorkbenchWindow().getActivePage();
					try {
						IDE.openEditor(page, file, true);
					} catch (PartInitException e) {
					}
				}
			});
			monitor.worked(1);
		}catch(Exception ex){
			ex.printStackTrace();
		}
	}
	
	public static void main(String[] args){
		System.out.println(SampleNewWizard.class.getClassLoader().getResource("MyHtml.html"));
		InputStream stream = SampleNewWizard.class.getClassLoader().getResourceAsStream("MyHtml.html");
		
		try {
			System.out.println(stream.available());
		} catch (IOException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
	}
	
	/**
	 * We will initialize file contents with a sample text.
	 */
	private InputStream openContentStream(String ipath) throws UnsupportedEncodingException {
		InputStream stream = this.getClass().getClassLoader().getResourceAsStream("MyHtml.html");
		// JOptionPane.showMessageDialog(null, stream);
		int len = 0;
		try {
			len = stream.available();
		} catch (IOException e1) {
			e1.printStackTrace();
		}
		byte[] data = new byte[len];
		try {
			stream.read(data);
		} catch (IOException e) {
			e.printStackTrace();
		}finally{
			if(stream!=null){
				try {
					stream.close();
				} catch (IOException e) {
					e.printStackTrace();
				}
			}
		}
		String contents = new String(data,"UTF-8");
		contents = contents.replace("@ipath", ipath.replace("/", "").replace("\\", ""));
		return new ByteArrayInputStream(contents.getBytes("UTF-8"));
	}

	private void throwCoreException(String message) throws CoreException {
		IStatus status =
			new Status(IStatus.ERROR, "sssex", IStatus.OK, message, null);
		throw new CoreException(status);
	}

	/**
	 * We will accept the selection in the workbench to see if
	 * we can initialize from it.
	 * @see IWorkbenchWizard#init(IWorkbench, IStructuredSelection)
	 */
	public void init(IWorkbench workbench, IStructuredSelection selection) {
		this.selection = selection;
	}
}